Floor support structure

Abstract

To provide a floor support structure capable of accommodating floors of complex shapes with a simple configuration.SOLUTION: A floor support structure 10 according to the present disclosure comprises: a support leg 11 extending in a vertical direction and supported from below on a foundation surface; a first connecting member 12 attached to the support leg 11; a sleeper material 13 in a circular cross sectional shape connected to the support leg 11 via the first connecting member 12; a joist 14 disposed on the sleeper material 13 and extending in a direction intersecting with the sleeper material 13; and a second connecting member 15 connecting the sleeper material 13 and the joist 14. The first connecting member 12 comprises: a first member 16 rotatably supported by the support leg 11 around a first axis X extending in the vertical direction; and a second member 17 rotatably supported by the first member 16 around a second axis Y extending in a direction intersecting with both the vertical direction and the direction of extension of the sleeper material 13 to support the sleeper material 13. The second connecting member 15 rotatably connects the joist 14 to the sleeper material 13 around a third axis Z extending in a direction of extension of the sleeper material 13.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a floor support structure. [Background technology]

[0002] Patent Document 1 discloses a floor support device that supports floor members such as a stage in a gymnasium. The area near the stage where the floor support device is installed has a triple-floor type structure. The stage part is provided with a stage floor, and below this stage floor is an intermediate stage floor, which is continuous with the gymnasium floor. In laying this intermediate floor, floor supports are installed at required positions on the slab surface at a predetermined interval, and circular steel pipes are erected as joists on the floor supports in the left and right directions toward the stage. When erecting the circular steel pipes, they are arranged so that they intersect closely with the cylindrical body of the stage support. Then, at the intersection between the circular steel pipes and the stage support, they are joined using a clamp member that joins the circular steel pipes and the stage support while they are perpendicular to each other. Then, on top of the circular steel pipes, joists are placed at a predetermined interval in a direction perpendicular to the circular steel pipes. On top of the joists, waste boards made of lauan plywood or the like are placed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-177253 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, there are floors with complex shapes, such as floors that are inclined relative to the horizontal, floors that are formed into curved surfaces, or floors that combine these. When constructing floors with such complex shapes, the floor support structure that supports the floor becomes complicated because it is difficult to extend the joists and beams in a straight line.

[0005] The floor support structure described in Patent Document 1 is a floor support structure for forming a level floor, and it is difficult to accommodate floors with complex shapes.

[0006] Therefore, an object of the present disclosure is to provide a floor support structure that can accommodate floors of complex shapes with a simple configuration. [Means for solving the problem]

[0007] In order to solve the above problems, a floor support structure of a first aspect of the present invention comprises a support leg extending in the vertical direction and supported from below on a foundation surface, a first connecting member attached to the support leg, a beam having a circular cross-section connected to the support leg via the first connecting member, a joist placed on the beam and extending in a direction intersecting the beam, and a second connecting member connecting the beam and the joist, wherein the first connecting member has a first member supported by the support leg so as to be rotatable around a first axis extending in the vertical direction, and a second member supported by the first member so as to be rotatable around a second axis extending in a direction intersecting both the vertical direction and the extension direction of the beam and supporting the beam, and the second connecting member connects the joist to the beam so as to be rotatable around a third axis extending in the extension direction of the beam.

[0008] A second aspect of the present invention is a floor support structure of the first aspect above, wherein the first member and the second member of the first connecting member are fixed to each other by a fastening member extending along the second axis, and the beam can be rotated about the second axis relative to the support leg by loosening the fastening member.

[0009] A third aspect of the present invention is a floor support structure of the first or second aspect described above, wherein the second connecting member has a bearing portion having an inner surface with an arc-shaped cross section that faces the outer surface of the beam, and a fixing portion that is integrally formed with the bearing portion and fixed to the joist, and the joist can rotate about the third axis relative to the beam by loosening the fastening of the beam by the bearing portion of the second connecting member. Effect of the Invention

[0010] According to the present disclosure, it is possible to provide a floor support structure that is capable of accommodating floors of complex shapes with a simple configuration. [Brief description of the drawings]

[0011] [Figure 1] 1A and 1B are explanatory diagrams of a floor to which a floor support structure according to one embodiment of the present invention is applied, in which (a) shows the state as viewed from above, and (b) shows the state as viewed from the direction of the white arrow in (a). [Diagram 2] FIG. 2 is a perspective view of the floor support structure of part II in FIG. 1 from below. [Diagram 3] FIG. 2 is a cross-sectional view taken along the line III-III in FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. [Diagram 5] FIG. 13 is a perspective view from below showing a modified example of the floor support structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0013] Fig. 1 is an explanatory diagram of a floor to which a floor support structure according to an embodiment of the present invention is applied, where (a) shows a state seen from above and (b) shows a state seen from the direction of the white arrow in (a). Fig. 2 is a perspective view from below of the floor support structure of part II in Fig. 1. Fig. 3 is a cross-sectional view taken along the line III-III in Fig. 1. Fig. 4 is a cross-sectional view taken along the line IV-IV in Fig. 1. Fig. 5 is a perspective view from below showing a modified example of the floor support structure.

[0014] (floor support structure) The floor support structure 10 according to this embodiment is capable of supporting a floor material P (see FIG. 5) with a simple configuration, even when constructing a floor 1 having a relatively complicated shape with curved surfaces both in plan as shown in FIG. 1(a) and in elevation as shown in FIG. 1(b). A plurality of floor support structures 10 are provided on the floor 1. The floor support structure 10 according to this embodiment may be applied to a floor formed of members that extend linearly both in plan and elevation.

[0015] As shown in Figures 1 to 4, the floor support structure 10 of this embodiment comprises a support leg 11 supported from below on a foundation surface S, a first connecting member 12 attached to the support leg 11, a beam 13 having a circular cross-section attached to the first connecting member 12, a joist 14 arranged on the beam 13, and a second connecting member 15 connecting the beam 13 and the joist 14.

[0016] (Support leg) The support leg 11 is a member for supporting the beam 13 from the base surface S side below, and extends in the vertical direction to be supported from below by the base surface S. For example, as shown in FIG. 1(b), the support leg 11 may have a support member 11a fixed to the base surface S and a columnar member 11b whose lower end is supported by the support member 11a. The support member 11a is fixed to the base surface S, for example, by fastening a bolt to an anchor or the like that is embedded in the base surface S beforehand. The support member 11a may support the columnar member 11b so that the height can be adjusted. The upper end of the columnar member 11b in this embodiment is formed in the shape of a bolt extending in the vertical direction, centered on a first axis X (X-axis in the figure) extending in the vertical direction.

[0017] The configuration of the support leg 11 is not limited to the above, but may be any configuration that extends in the vertical direction, is supported from below on the base surface S, and rotatably supports the first connecting member 12 around the first axis X. In the present invention, "rotatable" means that it can be put into a rotatable state, and may be always rotatable, or may be put into a rotatable state by loosening a fixing member.

[0018] (First connecting member) The first connecting member 12 is a member for connecting the support leg 11 and the puller 13 so as to be swingable, and is attached to the support leg 11. The first connecting member 12 may be attached to the support leg 11 so as to be height adjustable. The first connecting member 12 has a first member 16 on the support leg 11 side and a second member 17 on the puller 13 side. The first connecting member 12 is supported by the support leg 11 so as to be rotatable about a first axis X, and supports the puller 13 so as to be rotatable about a second axis Y (Y axis in the figure) extending in a direction intersecting (perpendicular to) the vertical direction. The second axis Y is an axis extending in a direction intersecting both the vertical direction and the extension direction of the puller 13 described later.

[0019] (First member) The first member 16 of the first connecting member 12 is a member that is attached to the support leg 11 out of the support leg 11 and the rail 13, and is supported by the support leg 11 to be rotatable about the first axis X.

[0020] The first member 16 of this embodiment is, for example, a short angle bar having two plate portions 16a and 16b. One plate portion 16a of the first member 16 that crosses the vertical direction is formed with a bolt insertion hole 18 through which a bolt at the upper end of the columnar member 11b of the support leg 11 (hereinafter, sometimes simply referred to as the "bolt of the support leg 11") can be inserted. The first member 16 is fixed to the support leg 11 by attaching nuts 19a and 19b to the upper and lower positions of one plate portion 16a of the first member 16 among the bolts of the support leg 11, and tightening the plate portion 16a with the upper and lower nuts 19a and 19b. In addition, the first member 16 can be rotated around the first axis X with respect to the support leg 11 by loosening the upper and lower nuts 19a and 19b. This makes it possible to adjust the orientation (extension direction) of the joist 13 around the first axis X. Furthermore, the height of the first member 16 can be adjusted in the vertical direction by loosening the upper and lower nuts 19a, 19b, thereby making it possible to adjust the height of the beams 13. That is, the first member 16 is supported by the support leg 11 so as to be rotatable about the first axis X and so as to be adjustable in height in the vertical direction.

[0021] In this embodiment, the first member 16 is rotatable around the first axis X and is height adjustable in the vertical direction, but this is not limited thereto, and it is sufficient that the first member 16 is at least rotatable around the first axis X. In this embodiment, the upper and lower nuts 19a, 19b are provided, and the first member 16 is rotatable by loosening these nuts, but this is not limited thereto. For example, a female screw that can be screwed into the bolt of the support leg 11 may be formed on the inner peripheral surface of the bolt insertion hole 18 of one plate portion 16a of the first member 16, and the first member 16 may be supported by the support leg 11 so as to be rotatable around the first axis X by the female screw. In addition, a buffer material or a damping material that absorbs vibration may be provided between the support leg 11 and the first member 16.

[0022] In the first member 16, a bolt insertion hole 20 penetrating in the axial direction of the second axis Y is formed in the other plate portion 16b standing up from the one plate portion 16a. A bolt (fastening member) 21 that fastens the first member 16 and the second member 17 is inserted into the bolt insertion hole 20 of the other plate portion 16b.

[0023] In this embodiment, the first member 16 is a short angle bar having two plate portions 16a, 16b, but this is not limited to this, and the first member 16 may be any member that is supported by the support leg 11 so as to be rotatable about the first axis X.

[0024] (Second member) The second member 17 of the first connecting member 12 is a member that is attached to the larger rail 13 out of the support leg 11 and the larger rail 13, and is supported by the first member 16 so as to be rotatable about the second axis Y.

[0025] The second member 17 of this embodiment integrally comprises an annular portion 17a formed in a generally annular shape with a portion open and capable of fastening the rail 13, and standing plate portions 17b standing outward in the radial direction from both open circumferential ends of the annular portion 17a. Note that "integrally comprising the annular portion 17a and the standing plate portions 17b" may mean that the annular portion 17a and the standing plate portions 17b are integrally molded, or that the annular portion 17a and the standing plate portions 17b are formed separately and fixed together to form an integral body.

[0026] The annular portion 17a of the second member 17 has a support surface 24 with an arc-shaped cross section that extends in the circumferential direction along the outer circumferential surface 13a of the beam 13. Both circumferential ends of the annular portion 17a are located at the lower end of the annular portion 17a and are arranged close to each other. The standing plate portions 17b protrude from both circumferential ends of the annular portion 17a in the radially outward direction in approximately the same direction (downward). The standing plate portions 17b are formed with bolt insertion holes 22 through which a bolt 21 can be inserted. With the bolt insertion hole 22 of the standing plate portion 17b and the bolt insertion hole 20 of the plate portion 16b of the first member 16 aligned, the bolt 21 is inserted into both bolt insertion holes 20, 22 and tightened against a nut (fastening member) 23, whereby the second member 17 is fixed to the first member 16.

[0027] In this embodiment, the second member 17 is composed of an annular portion 17a formed in an approximately annular shape and upright plate portions 17b protruding from both circumferential ends of the annular portion 17a, but is not limited to this. The second member 17 may be supported by the first member 16 so as to be rotatable around the second axis Y and support the beam 13.

[0028] When the first member 16 and the second member 17 of the first connecting member 12 are fastened together with the bolts 21 and nuts 23, the annular portion 17a of the second member 17 tightens the puller 13 radially inward. This restricts the movement of the puller 13 relative to the second member 17 of the first connecting member 12. The puller 13 and the second member 17 may be fastened together with screws or the like. A cushioning or damping material for absorbing vibrations may be provided between the puller 13 and the second member 17.

[0029] When the bolt 21 fastening the first member 16 and the second member 17 of the first connecting member 12 is loosened, the second member 17 becomes rotatable about the second axis Y relative to the first member 16. That is, the second member 17 is supported by the first member 16 so as to be rotatable about the second axis Y, and supports the puller 13. In this manner, by loosening the bolt 21, the puller 13 becomes rotatable about the second axis Y relative to the support leg 11. This makes it possible to adjust the angle of the puller 13 about the second axis Y. In addition, in this embodiment, by loosening the bolt 21, the restriction on the movement of the puller 13 relative to the second member 17 of the first connecting member 12 is also released. Specifically, the puller 13 is rotatable relative to the second member 17 of the first connecting member 12 about a third axis Z (Z axis in the figure) extending along the extension direction of the puller 13, and is also movable in the axial direction of the third axis Z. The third axis Z extends in a direction intersecting (orthogonal to) both the first axis X and the second axis Y.

[0030] (Joist) The joists 13 are members that support the joists 14 and are formed to have a circular cross section. In this embodiment, the joists 13 are formed to have a cylindrical shape with a hollow cross section. The joists 13 are supported from below by the support legs 11 via the first connecting member 12 in a state in which the joists 13 are inserted through the radially inner side of the annular portion 17a of the second member 17 of the first connecting member 12 and fastened to the annular portion 17a. The joists 13 may be curved (see FIG. 1(a)) or extend linearly (not shown) so as to correspond to the complex shape of the floor 1. The shape of the joists 13 is not limited to a cylindrical shape with a hollow cross section, and may be, for example, a round bar shape with a solid cross section.

[0031] (Joists) The joists 14 support the floor material P from below by appropriate means. The joists 14 may be curved (see FIG. 1(b)) or may extend straight (not shown) so as to accommodate the complex shape of the floor 1. The joists 14 are supported on the beams 13 via second connecting members 15 (described later) so as to be rotatable about a third axis Z.

[0032] The common joist 14 in this embodiment is, for example, a lip channel steel having a substantially C-shaped cross section. The common joist 14 is placed above the beams 13 with the lip portion 14a facing the beams 13, and is attached to the beams 13 via the second connecting member 15. Note that the common joist 14 is not limited to a lip channel steel having a substantially C-shaped cross section, and may be, for example, a pipe material having a rectangular cross section, or wood having a rectangular cross section.

[0033] (Second connecting member) The second connecting member 15 is a member that connects the joist 14 to the beam 13 so as to be rotatable about the third axis Z.

[0034] For example, the second connecting member 15 of the present embodiment integrally has a bearing portion 25 that fits along the outer peripheral surface 13a of the beam 13, and a fixing portion 26 that is fixed to the joist 14. Incidentally, having the bearing portion 25 and the fixing portion 26 integrally may mean that the bearing portion 25 and the fixing portion 26 are integrally molded, or that the bearing portion 25 and the fixing portion 26 are formed separately and fixed to each other to form an integral unit.

[0035] The bearing portion 25 of the second connecting member 15 is formed in a substantially U-shape with a support surface (inner peripheral surface) 27 with an arc-shaped cross section that faces the outer peripheral surface 13a of the puller 13. The puller 13 is inserted into the inside of the bearing portion 25. The bearing portion 25 supports the puller 13 with the open end side (fixing portion 26 side) facing upward so that the support surface 27 fits along the outer peripheral surface 13a of the puller 13.

[0036] The fixing portions 26 of the second connecting member 15 are fixed to the joists 14 placed on the beams 13. The fixing portions 26 extend in directions away from each other from both ends of the bearing portion 25. In this embodiment, the fixing portions 26 are fixed to the lip portions 14a of the joists 14 by bolts 28 and nuts 29 on both sides of the beams 13. Note that the fixing of the second connecting member 15 and the joists 14 is not limited to the fixing by the bolts 28 and nuts 29, and may be fixed by, for example, screws.

[0037] By fixing the fixing portion 26 of the second connecting member 15 to the joist 14, the bearing portion 25 presses the joist 13 towards the joist 14. In other words, when the second connecting member 15 and the joist 14 are fixed, the bearing portion 25 tightens the joist 13 towards the joist 14. Then, by loosening the fastening by the bolts 28 and nuts 29 and loosening the tightening of the joist 13 by the bearing portion 25 of the second connecting member 15, the joist 14 becomes rotatable about the third axis Z relative to the joist 13. This makes it possible to adjust the angle of the joist 14 relative to the joist 13 around the third axis Z.

[0038] A cushioning or damping material for absorbing vibrations may be provided between the second connecting member 15 and the joists 14. A cushioning or damping material for absorbing vibrations may be provided between the second connecting member 15 and the beams 13. A cushioning or damping material for absorbing vibrations may be provided between the beams 13 and the joists 14. The bearing portions 25 of the second connecting member 15 and the beams 13 may be fixed with screws or the like.

[0039] In the floor support structure 10 configured as above, since the joists 13 have a circular cross section, when it is desired to fit the joists 13 to a curved surface, they can be easily curved at the construction site. Therefore, unlike the case where a plurality of short, straight joists with rectangular cross sections are closely arranged and connected to each other along a curved surface, as shown in Fig. 1(a), it is possible to arrange long curved joists 13 along the curved surface, thereby reducing the number of parts and the number of work steps. In this way, even when it is desired to fit the joists 13 to a curved surface, it is possible to do so with a simple configuration.

[0040] In addition, since the joists 13 have a circular cross section, unlike the case where the joists 14 have a rectangular cross section, the contact state of the joists 14 with respect to the joists 13 is approximately constant regardless of the angle of the joists 14. For example, when the joists have a rectangular cross section, the upper surface of the joists on which the joists 14 are placed is a horizontal surface, so if the joists 14 are inclined relative to the joists or a curved joist 14 is placed, a gap adjustment member with an angle that matches the gap between the upper surface (horizontal surface) of the joists 14 and the lower surface of the joists 14 is required. In this embodiment, the contact state of the joists 14 with respect to the joists 13 is approximately constant regardless of the angle of the joists 14. Therefore, even if the joists 14 are curved as shown in FIG. 1(b), the joists 13 and joists 14 can be fixed to each other without using a gap adjustment member. This allows the number of parts to be reduced, and the number of work steps to be reduced.

[0041] The first connecting member 12 has a first member 16 supported by the support leg 11 rotatably around a first axis X extending in the vertical direction, and a second member 17 supported by the first member 16 rotatably around a second axis Y and supporting the puller 13. As a result, the puller 13 is supported by the support leg 11 via the first connecting member 12 rotatably around the first axis X and rotatably around the second axis Y. The second connecting member 15 connects the joist 14 to the puller 13 rotatably around the third axis Z. As a result, the joist 14 is supported by the puller 13 via the second connecting member 15 rotatably around the third axis Z. In this way, the puller 13 and the joist 14 can be rotated around the first axis X, the second axis Y, and the third axis Z, so that the puller 13 and the joist 14 can be tilted independently according to the inclination of the floor 1.

[0042] The first connecting member 12 has a first member 16 supported by the support leg 11 so as to be rotatable about the first axis X, and a second member 17 supported by the first member 16 so as to be rotatable about the second axis Y and supporting the beams 13. In this way, since the first connecting member 12 is made up of the first member 16 and the second member 17, it is possible to make the beams 13 and the joists 14 rotatable about two axes (the first axis X and the second axis Y) with a simple configuration.

[0043] Furthermore, by configuring the second connecting member 15 by the bearing portion 25 and the fixing portion 26, the beams 13 and the joists 14 can be made rotatable about the third axis Z with a simple configuration.

[0044] Therefore, according to this embodiment, it is possible to provide a floor support structure 10 that can accommodate a floor 1 having a complex shape with a simple configuration.

[0045] In this embodiment, the second connecting member 15 is composed of a bearing portion 25 that fits along the outer peripheral surface 13a of the beam 13 and a fixing portion 26 that is fixed to the joist 14, but is not limited to this and may be any member that connects the joist 14 to the beam 13 so as to be rotatable around the third axis Z.

[0046] In addition, in this embodiment, the bolts 21 and nuts 23 are provided to fix the first member 16 and the second member 17 of the first connecting member 12, and the bolts 21 and nuts 23 are loosened to allow the rail 13 to rotate about the second axis Y relative to the support leg 11, but this is not limited to the above. For example, instead of the bolts 21 and nuts 23, a rotating shaft member may be provided that simply connects the first member 16 and the second member 17 to be rotatable about the second axis Y, and the first member 16 and the second member 17 may be in a rotatable state.

[0047] In addition, the first member 16 of the first connecting member 12 is formed from a short angle bar, and the second member 17 is formed into a substantially annular shape, but the first connecting member 12 is not limited to this. For example, as in the first connecting member 30 shown in Fig. 5, the first member 31 may be formed from a short channel with a C-shaped cross section, and the second member 32 may be formed in the shape of a hanger that can be hooked onto the rail 13.

[0048] As shown in FIG. 5, the first member 31 of the first connecting member 30 integrally has a web 31a extending in the vertical direction and upper and lower flanges 31b, 31c bent from both the upper and lower ends of the web 31a. A bolt insertion hole (not shown) is provided in the lower flange 31c, and the bolt of the support leg 11 is inserted through the bolt insertion hole. The first member 31 is fixed to the bolt of the support leg 11 by upper and lower nuts 33 (the upper nut is not shown in FIG. 5) located above and below the lower flange 31c. By loosening the upper and lower nuts 33, the first member 31 becomes rotatable about the first axis X relative to the support leg 11 and the height of the first member 31 becomes adjustable in the vertical direction. That is, the first member 31 is supported by the support leg 11 so as to be rotatable about the first axis X and so as to be adjustable in the vertical direction. A bolt insertion hole (not shown) centered on the second axis Y is formed in the web 31a of the first member 31.

[0049] As shown in Fig. 5, the second member 32 of the first connecting member 30 is formed in an inverted U-shape so that it can be hooked onto the puller 13 from above. The second member 32 integrally includes an upper plate portion 32a located above the puller 13, a first vertical plate portion 32b extending downward from one end of the upper plate portion 32a along the side surface of the puller 13, and a second vertical plate portion 32c extending downward from the other end of the upper plate portion 32a along the side surface of the puller 13. The second vertical plate portion 32c has a vertical length longer than the outer diameter of the puller 13 and is formed shorter than the first vertical plate portion 32b in the vertical direction. Two bolt insertion holes (not shown) are formed in the second vertical plate portion 32c at a position spaced downward from the upper plate portion 32a by at least the outer diameter of the puller 13. Furthermore, two bolt insertion holes (not shown) are formed in the first vertical plate portion 32b at positions facing the two bolt insertion holes of the second vertical plate portion 32c. Two bolts 34 that support the beam 13 from below are inserted into the two opposing bolt insertion holes of the second vertical plate portion 32c and the first vertical plate portion 32b. The two bolts 34 are tightened to nuts (not shown). By tightening the bolts 34, the beam 13 is sandwiched between the second vertical plate portion 32c and the first vertical plate portion 32b.

[0050] As shown in FIG. 5, the outer surface of the region of the first vertical plate portion 32b that protrudes downward from the second vertical plate portion 32c is in surface contact with the back surface of the web 31a of the first member 31. A bolt insertion hole (not shown) is formed in the first vertical plate portion 32b at a position facing the bolt insertion hole of the web 31a of the first member 31. A bolt (fastening member) 35 that fixes the first member 31 and the second member 32 to each other is inserted into the bolt insertion holes facing each other in the first vertical plate portion 32b and the web 31a of the first member 31. The bolt 35 extends along the second axis Y. The first member 31 and the second member 32 are fixed to each other by tightening the bolt 35 to a nut (fastening member) 36. Then, by loosening the bolt 35 and the nut 36, the joist 13 becomes rotatable about the second axis Y with respect to the support leg 11. This makes it possible to adjust the angle of the beam 13 relative to the support leg 11 about the second axis Y. As in the above embodiment, instead of the bolts 35 and nuts 36, a rotating shaft member may be provided that simply connects the first member 31 and the second member 32 rotatably about the second axis Y, so that the first member 31 and the second member 32 are rotatable.

[0051] Although the present invention has been described based on the above embodiment, the present invention is not limited to the contents of the above embodiment, and can be modified as appropriate without departing from the scope of the present invention. In other words, all other embodiments, examples, and operational techniques made by those skilled in the art based on this embodiment are naturally included in the scope of the present invention. [Explanation of symbols]

[0052] 1:Floor 10: Floor support structure 11:Support leg 12, 30: First connecting member 13: Beam 14: Joist 15: Second connecting member 16,31: First member 17, 32: Second member 21, 35: Bolt (fastening member) 23, 36: Nut (fastening member) 25: Bearing 26: Fixed part

Claims

1. A support leg extending in the vertical direction and supported from below by the foundation surface; A first connecting member attached to the support leg; A beam having a circular cross section that is connected to the support leg via the first connecting member; A joist is disposed on the slats and extends in a direction intersecting the slats; A second connecting member that connects the beam and the joist, The first connecting member has a first member supported by the support leg so as to be rotatable about a first axis extending in a vertical direction, and a second member supported by the first member so as to be rotatable about a second axis extending in a direction intersecting both the vertical direction and the extension direction of the beam, and supporting the beam; The second connecting member connects the joist to the beam so as to be rotatable about a third axis extending in the extension direction of the beam. A floor support structure comprising:

2. The first and second members of the first connecting member are fixed to each other by a fastener extending along the second axis, The beam is made rotatable about the second axis relative to the support leg by loosening the fastening member.

2. The floor support structure of claim 1.

3. The second connecting member has a bearing portion having an inner peripheral surface with an arc-shaped cross section facing the outer peripheral surface of the beam, and a fixing portion integrally formed with the bearing portion and fixed to the joist, The joist is made rotatable about the third axis relative to the joist by loosening the fastening of the joist by the bearing portion of the second connecting member.

3. A floor support structure according to claim 1 or claim 2.

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